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[saroooor]

Assalam-o-alaikum wr wb..
it IS A

Sorry I meant why isn't it B ?
For June 11 Variant 1 It has the question of pollen grain ? when they asked path of pollen tube .

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

Assalam-o-alaikum wr wb...

Chemistry Questions :
november 05 # 39 I do know that because there is no double bond so it is an alkane which will not decolourise the bromine , but if you count the number of carbon atoms and hydrogen atoms it will give you C6H12 Which is matching the General formula alkene CnH2n . So it could be B . ??!

the answer IS B...bcoz alkanes CAN burn....!

Chemistry Questions :
June 06 # 19 three of them will produce Cu ions . I do understand that for Cu + H2so4 ->CuSo4(copper Cu2+ ion present ) + H2 . and for CuCo3+H2so4-> CuSo4 (Cu2+ ions present ) +H20 + c02 .What about Cu(OH)2 + H2so4???Why there is no copper ions .

A metal doesn't react with any acid...so in the first test tube there is no reaction...
in the second test tube...a reaction will take place so tehre will be copper ions in it..same will happen in test tube 3! and therefore the answer is C.

Chemistry Questions :
November 06 # 5 did not get it .

I think the answer is wrong in the mark scheme...it should be 2
cuz there are 2 chlorine (17) one noble gas (Argon) and 2 Metals (Potassium)
i don't think that noble gas is a nonmetal
correct me if i am wrong...

Chemistry Questions :
November 08# 20 why does the ph fall because BaNo3 + HCL-> Bacl + Hno3 ( Which one is acidic to decrease the pH 'from the products' ??!!!)

Barium nitrate is alkaline...when you add dilute HCl in it...it becomes acidic...i.e the pH decreases!
and no precipitate forms! (bcoz barium chloride is aqueous)

 

[Razo513]

Sorry I meant why isn't it B ?
For June 11 Variant 1 It has the question of pollen grain ? when they asked path of pollen tube .

i guess they wanted the shortest reasonable one so it cant be C since it's coming from the outside so it will be D

 

[saroooor]

i guess they wanted the shortest reasonable one so it cant be C since it's coming from the outside so it will be D

How , like Why C even it is outside . I believe it could be D because it is coming from tip . Were it was picked from the pea plant . I dunno maybe .

 

[saroooor]

Assalam-o-alaikum wr wb...



the answer IS B...bcoz alkanes CAN burn....!

A metal doesn't react with any acid...so in the first test tube there is no reaction...
in the second test tube...a reaction will take place so tehre will be copper ions in it..same will happen in test tube 3! and therefore the answer is C.

I think the answer is wrong in the mark scheme...it should be 2
cuz there are 2 chlorine (17) one noble gas (Argon) and 2 Metals (Potassium)
i don't think that noble gas is a nonmetal
correct me if i am wrong...

Barium nitrate is alkaline...when you add dilute HCl in it...it becomes acidic...i.e the pH decreases!
and no precipitate forms! (bcoz barium chloride is aqueous)

What made the Barium Nitrate acidic ? I believe because it formed hno3 ?

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

i guess they wanted the shortest reasonable one so it cant be C since it's coming from the outside so it will be D

aoa wr wb...
it's bcoz pollen grains lands on top of the pod..not from sepals or in between!

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

What made the Barium Nitrate acidic ? I believe because it formed hno3 ?

Hydrochloric acid made it acidic...

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

What made the Barium Nitrate acidic ? I believe because it formed hno3 ?

plus...HNO3 is acidic! (Nitric acid)

 

[saroooor]

Assalam-o-alaikum wr wb...



the answer IS B...bcoz alkanes CAN burn....!

A metal doesn't react with any acid...so in the first test tube there is no reaction...
in the second test tube...a reaction will take place so tehre will be copper ions in it..same will happen in test tube 3! and therefore the answer is C.

I think the answer is wrong in the mark scheme...it should be 2
cuz there are 2 chlorine (17) one noble gas (Argon) and 2 Metals (Potassium)
i don't think that noble gas is a nonmetal
correct me if i am wrong...

Barium nitrate is alkaline...when you add dilute HCl in it...it becomes acidic...i.e the pH decreases!
and no precipitate forms! (bcoz barium chloride is aqueous)

i thought the same thing for rhere 2is 2 chlorines only so the answer should be 2 .

 

[saroooor]

aoa wr wb...
it's bcoz pollen grains lands on top of the pod..not from sepals or in between!

I don' think so ... since stigma is also located between the sepals and between anthers .

 

[saroooor]

i thought the same thing for rhere 2is 2 chlorines only so the answer should be 2 .

Alkenes can burn also .

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

Assalam-o-alaikum wr wb...

 

[Ahmed Khider]

Assalam-o-alaikum wr wb...

View attachment 12376

Well i think u mixed up..the ms answer is right becoz it counted the two 17s(isotopes) plus 18(argon) so it becomes 3 ..U must have counted 17 only once becoz the 2 are isotopes

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

Well i think u mixed up..the ms answer is right becoz it counted the two 17s(isotopes) plus 18(argon) so it becomes 3 ..U must have counted 17 only once becoz the 2 are isotopes

argon is a noble gas...do you count it as a non metal??? (that's my question )

Jazakallah Khair anyway

 

[Ahmed Khider]

argon is a noble gas...do you count it as a non metal??? (that's my question )

Jazakallah Khair anyway

Ya definitely..anything which is a non metal eg:noble gas,halogens etc..is considered as a non metallic element And sorry i didnt read your question well

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

Ya definitely..anything which is a non metal eg:noble gas,halogens etc..is considered as a non metallic element And sorry i didnt read your question well

nah LOL...it's okie
and well...jazakallah Khair
May Allah give you success in this world as well as the hereafter...and may He make the papers easy for you...Aameen

 

[Ahmed Khider]

nah LOL...it's okie
and well...jazakallah Khair
May Allah give you success in this world as well as the hereafter...and may He make the papers easy for you...Aameen

May the same go to you thx alot

 

[Lost_Life]

Warning:
in need of assistance again... XC
MJ 2006 QUESTION 4 ISNT IT A NOT C????!!!!!
ALSO CAN ANYONE GIVE ME SOME TIPS ON CHEM PAPER1 ?
I WOULD REALLY APPRECIATE THAT :')

 

[Ahmed Khider]

Warning:
in need of assistance again... XC
MJ 2006 QUESTION 4 ISNT IT A NOT C????!!!!!
ALSO CAN ANYONE GIVE ME SOME TIPS ON CHEM PAPER1 ?
I WOULD REALLY APPRECIATE THAT :')

Ya its definitely A not C..As for tips..study the syllabus and then solve as many pastpapers as u can specially the old ones..thats the greatest tip i can give u

 

[Tekno-M]

Warning:
in need of assistance again... XC
MJ 2006 QUESTION 4 ISNT IT A NOT C????!!!!!
ALSO CAN ANYONE GIVE ME SOME TIPS ON CHEM PAPER1 ?
I WOULD REALLY APPRECIATE THAT :')

Biology or chemistry?